I am very much ____ to hear that Mr. Smith is so seriously ill.
A. frightened
B. frustrated
C. disappointed
D. distressed
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Louis Herman, at the University of Hawaii, has ____ a series of new experiments to determine the intelligence in some animals.
A. installed
B. formatted
C. devised
D. equipped
There is supposed to be a ____ which serves to give full play to workers' initiative.
A. mechanics
B. machine
C. mechanic
D. mechanism
We should make a clear ____ between the two scientific terms for the purpose of our discussion.
A. separation
B. selection
C. distinction
D. division
位于胸锁乳突肌与斜方肌之间凹陷处、平耳垂的穴位是( ),主治头晕、后头痛、颈痛、眼病。
A. 风池
B. 太阳
C. 人中
D. 百会