问题 填空题

形成芽孢是细菌繁殖后代的方式之一.______.

答案

细菌的生殖方式是分裂生殖.芽孢是某些细菌于生长后期,在细胞内形成的一个圆形、椭圆形或圆柱形的休眠体,能产生芽孢的多为杆菌,产芽孢母细胞的外壳称芽孢囊.芽孢具有极强的抗热、抗辐射、抗化学药物和抗静水压等特性,堪称生命世界之最,所以有些细菌在环境条件不利于生长繁殖时便会形成芽孢.当芽孢落在适宜的环境中就会重新萌发形成一个新的个体.所以芽孢不是细菌的生殖方式,而是一种特殊的休眠体.

故答案为:×

单项选择题 A1/A2型题
完形填空
John was waiting for the girl whose heart he knew, but whose face he didn’t, the girl with the rose. Thirteen months ago, in a Florida library he took a book off the ___36___and found himself interested in the notes in the margin. The soft handwriting ___37___a thoughtful soul and insightful mind.
In front of the book, he ___38___the previous owner’s name, Miss Hollis Maynell. With time and effort he ___39___her address. He wrote her a letter ___40___himself and inviting her to correspond.
During the next year and one-month the two grew to know each other ___41___the mail. A Romance was budding. John requested a(an) ___42___, but she refused. She felt that if he really cared, it wouldn’t matter what she looked like. Later they ___43___their first meeting—7:00 pm at Grand Central Station in New York
“You’ll ___44___me, ”she wrote, “by the red rose I’ll be wearing on my lapel. ”So at 7:00 he was in the ___45___looking for the girl with the red rose.
A young woman in a green suit was coming toward him, her ___46___long and slim and her eyes were blue as flowers. Almost ___47___he made one step closer to her, and just at this moment he saw Hollis Maynell—a woman well past 40. The girl was walking quickly away. He felt as though he split in two, so keen was his ___48___to follow her, and yet so deep was his longing for the woman whose ___49___had truly companioned him and upheld his own.
He did not ___50___. He squared his shoulders and said, “I’m John, and you must be Miss Maynell. I am so glad you could meet me;may I take you to ___51___?”
The woman smiled. “I don’t know what this is about, son, ”she answered, “but the young lady in the green suit ___52___me to wear this rose on my coat. And she said if you were to ask me out to dinner, I ___53___tell you that she is waiting for you in the ___54___across the street. She said it was some kind of ___55___!”
It’s not difficult to admire Miss Maynell’s wisdom. The true nature of a heart is seen in it’s response to the unattractive.
小题1:
A.exhibitionB.shelfC.figure D.diagram
小题2:
A.representedB.refreshedC.replaced D.rejected
小题3:
A.transformedB.conveyedC.observed D.discovered
小题4:
A.locatedB.expressedC.settled D.evaluated
小题5:
A.explainingB.introducingC.appointing D.predicting
小题6:
A.byB.onC.beyond D.through
小题7:
A.photographB.E-mailC.measurement D.document
小题8:
A.separateB.scheduledC.strengthen D.possessed
小题9:
A.recognizeB.witnessC.advocate D.tolerate
小题10:
A.libraryB.stationC.downtown D.square
小题11:
A.shadowB.shoulderC.appearance D.figure
小题12:
A.randomlyB.mentallyC.uncontrollablyD.ridiculously
小题13:
A.desireB.dreamC.attempt D.determination
小题14:
A.carefulnessB.wealthC.expectation D.spirit
小题15:
A.hesitateB.guaranteeC.submit D.hurry
小题16:
A.theatreB.dinnerC.shopping D.service
小题17:
A.advisedB.appliedC.begged D.required
小题18:
A.shouldB.wouldC.may D.must
小题19:
A.balconyB.restaurantC.corner D.department
小题20:
A.patienceB.experimentC.test D.decision