正常婴儿的呼吸频率为
A. 60次/分～80次/分
B. 40次/分～50次/分
C. 30次/分～40次/分
D. 25次/分～30次/分
E. 18次/分～20次/分
Had you prepared for your lecture, you（）more fluently.
A. should have spoken
B. would have spoken
C. would speak
D. had spoken
（）one-third of its employees is uncertain.
A. The company will dismiss
B. The company dismisses
C. That the company will dismiss
D. Will the company dismiss
What does the image the author presents to her students suggest
A. Women students needn't have the concerns of her generation.
B. Women have more barriers on their way to academic success.
C. Women can balance a career in science and having a family.
D. Women now have fewer problems pursuing a science career.
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