Mum, don't always tell me what to do and not to do, I'm old enough to ______ right ______ wrong.
A. tell; from
B. tell; and
C. say; and
D. talk; or
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He has ______ little education that he can't teach ______ little children.
A. very; so
B. so; such
C. such; such
D. so; so
Since the redesign of the assembly line, the productivity ______.
A. is improved
B. improves
C. is improving
D. has been improved.
On hearing this, Mr. Smith was angry. He suddenly ______ from the chair and rushed out.
A. raised
B. lifted
C. was raised
D. rose
第二心音听诊特点为
A. 音调较高而脆，历时约0.08秒，在心底部最响
B. 音调较低钝，强度较响，历时约0.1秒，在心尖部最响
C. 音调低，沉浊而弱，在心尖部及其内侧较明显
D. 音调低钝而重浊，持续时间约0.04秒，在心尖部及其内上方于仰卧位较清楚
E. 高调清脆而短促，在心尖部听诊最清楚
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