题目内容

When the bell sounded, the boys rushed out of the classroom, each______ a number of new books under his arm.

A. had carried
B. to carry
C. to be carried
D. carrying

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Frequently single-parent children take on some of the functions that the absent adult in the house______.

A. has served
B. would have served
C. serves
D. must serve

Just consider that we use hardly one hundred-thousandth of the heat______in coal and that

A. it is
B. there is
C. as is
D. what is

公共汽车上不允许吸烟，人人都要自觉zun 守。

患儿，8岁，精神差，以急性腹痛起病，临床表现为恶心、呕吐，脐周持续性钝痛伴阵发性加重，肠鸣音亢进。检查：白细胞计数升高，腹部X线示：肠袢轻度充气扩张，可见液平面，呈麻痹性肠梗阻征象。肠间隙增宽，黏膜皱襞变粗。
可能的诊断是

A. 急性坏死性结肠炎
B. 高位肠梗阻
C. 脾破裂
D. 急性阑尾炎
E. 感染性腹泻