问题
选择题
“绿叶在光下制造有机物”的实验中，把叶片放入酒精内隔水加热的目的是 [ ]
A．溶解淀粉
B．分解淀粉
C．破坏细胞膜
D．溶解叶绿素
答案
答案：D
搜题请搜索小程序“爱下问搜题”
“绿叶在光下制造有机物”的实验中，把叶片放入酒精内隔水加热的目的是 [ ]
A．溶解淀粉
B．分解淀粉
C．破坏细胞膜
D．溶解叶绿素
答案：D
完形填空 （10%） A young man works hard on his lessons. He is very busy studying. He doesn’t have __1__ to rest. After sometime, he falls ill. Every night, when he goes to bed, he __2__ his eyes and tries to sleep. But he can’t. He thinks, “I must go to __3__ the doctor.” He tells the doctor, “I can’t go to sleep at night.” “Try counting(数) __4__ . When you reach 1,000, you’ll be asleep,” says the doctor. The next day the man goes back to the doctor’s office. “Well,” says the doctor, “__5__ are you today?” “Well,” the man says, “I tried counting one, two, three … up to 1,000. __6__ when I reached 569, I began __7__ feel sleepy(犯困的). I had to __8__ and __9__ some tea. Then I went on counting up to 1,000 again. But I __10__ couldn’t fall asleep.”
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