不能提示病人呼吸功能不全的是（）
A. 肺活量低于预计值的60%
B. 通气储量百分比＜70%
C. 第一秒用力呼气量与用力肺活量的百分比（FEV1/FVC%）＜60%
D. 呼气时间短于3秒
E. 屏气时间短于30秒
可携带氨基酸，并将其转运到核蛋白体上的是( )
A. tRNA
B. mRNA
C. rRNA
D. snRNA
E. scRNA
Questions 11 to 18 are based on the conversation you have just heard.
A. The signing is very necessary.
B. The signing is just a reassurance.
C. The signing is not very necessary.
D. The signing is a way to monitor abuse.
Questions 19 to 22 are based on the conversation you have just heard.
A. They usually accept responsibility.
B. They blame factors beyond their control.
C. They complain about their personal problems.
D. They compare their behavior to others’.
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