调度绞车开车前,应检查绞车固定是否牢靠。
参考答案:对
—Didn' you go to your sister' wedding?
—No, didn'; I’d like to have, ______.[ ]
A. though
B. either
C. too
D. instead
诊断幽门梗阻最有价值的体征是()
A.振水音阳性
B.肠鸣音亢进
C.上腹部膨隆
D.明显脱水
E.上腹部固定压痛