双侧鼻导管吸氧的患儿,导管插入的深度是( )|给10岁儿童灌肠,肛管插入直肠的深度是( )|给4岁儿童进行胸外心脏按压时,使胸骨下陷的距离是( )|给10天的新生儿鼻饲时,插入胃管的长度是( ) A. 1cm~2cm B. 2.5~3cm C. 5~7.5cm D. 3~4cm E. 10cm
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参考答案:
举一反三
【单选题】Which of the following is TRUE?
A.
Once an industry has achieved tacit collusion, producers have an incentive to raise prices.
B.
Tacit collusion is legal in the United States.
C.
The fact that one firm changes its price shortly after another firm does is proof of tacit collusion.
D.
It is difficult to determine how much tacit collusion exists in a particular industry; hence tacit collusion remains hard to prosecute in the United States.