问题 选择题

判断潍县萝卜属于被子植物的主要依据是(  )

A.能进行光合作用

B.潍县萝卜在开花前,雄蕊和雌蕊被花冠包被着

C.有根、茎、叶的分化

D.种子外面有果皮包被着

答案

A、藻类植物、苔藓植物、蕨类植物、裸子植物等绿色植物都能进行光合作用,所以,能进行光合作用不是被子植物的主要依据.不符合题意.

B、被子植物的花蕊有的被花冠包被着,有的不被包被着,因此,这点不是被子植物的主要依据,不符合题意.

C、蕨类植物、裸子植物、被子植物都有根、茎、叶的分化,因此,这点不是被子植物的主要依据,不符合题意.

D、被子植物的种子外有果皮包被着,能形成果实.裸子植物的种子外无果皮包被着,裸露,不能形成果实,藻类植物、苔藓植物、蕨类植物无种子.可见种子外有果皮包被着可以作为被子植物的主要依据.符合题意.

故选:D

完形填空

第一节 完形填空(共10小题;每小题2分,满分20分)

阅读下面短文,掌握其大意,然后从21~30各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

Recently divorced in my 30s, I had no job and was on my way downtown on a rainy day to go to the employment offices. I had no umbrella, for my old one had   21   apart, and I couldn’t afford another one.

I sat down in the streetcar — there against the   22   was a beautiful silk umbrella with a silver handle inlaid with gold and bright enamel(珐琅). I had never seen anything so lovely. I

23   the handle and saw a name on it. The   24   procedure would have been to turn in the umbrella to the conductor, but I decided to take it and find the   25   myself.

I got off the streetcar in a downpour and   26   opened the umbrella to protect myself. Then I searched a telephone book for the   27   on the umbrella and found it. I called and a lady answered. Yes, she said in   28  , that was her umbrella, which her parents, now dead, had given her as a birthday present, but it’d been   29   from her locker at school years before.

She was so excited that I forgot I was looking for a job and went   30   to her house. She took the umbrella, her eyes filled with tears. I was only too happy to see her get back the lost umbrella, and get a job she offered me.

21.A.taken                      B.torn                        C.broken                    D.fallen

22.A.seat                        B.door                       C.engine                    D.floor

23.A.watched                  B.shook                     C.examined                D.tested

24.A.usual                      B.ordinary                 C.normal                   D.odd

25.A.thief                       B.owner                     C.robber                    D.keeper

26.A.hopefully                B.helpfully                 C.carefully                 D.slowly

27.A.name                      B.number                   C.address                   D.brand

28.A.happiness                B.disappointment        C.laughter                  D.surprise

29.A.robbed                   B.stolen                     C.taken                      D.hidden

30.A.simply                    B.calmly                    C.directly                   D.suddenly

多项选择题