如果盖盖玻片的方法不恰当，很容易出现气泡，影响观察效果。下列_爱下问搜题

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问题选择题

如果盖盖玻片的方法不恰当，很容易出现气泡，影响观察效果。下列四种盖盖玻片的方法中，最不容易出现气泡的是（图中半扁圆形结构代表水滴，箭头代表盖盖玻片的方向）[ ]

A．

B．

C．

D．

答案

答案：B

完形填空

选择正确单词完成下列短文。

       My name    1   Dan and I have two    2   , Bob and Ray. We like hamburgers    3    lunch. Bob and I    4
French fries but Ray   5   . I don't like   6   for breakfast.    7   Bob and Ray    8   . I like fruit for breakfast.
  9   really like chicken   10   salad for dinner.

( ) 1. A. is
( ) 2. A. brother
( ) 3. A. on
( ) 4. A. like
( ) 5. A. do
( ) 6. A. a egg
( ) 7. A. Or
( ) 8. A. do
( ) 9. A. They
( )10. A. or

B. am
B. sister
B. at
B. likes
B. don't
B. egg
B. And
B. don't
B. Them
B. but

C. are
C. sisters
C. for
C. eats
C. does
C. eggs
C. For
C. does
C. We
C. and

D. call
D. brothers
D. in
D. loves
D. doesn't
D. egges
D. But
D. doesn't
D. Us
D. of

单项选择题

心力衰竭时以下哪些体液因子不升高()

A．心钠肽

B．脑钠肽

C．精氨酸加压素

D．内皮素

E．内皮舒张因子