—I told you that he would go abroad for

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问题选择题

—I told you that he would go abroad for further study.

—Actually I had little doubt_____ it was true.

A．whether

B．since

C．that

D．if

答案

答案：C

单项选择题

关于自体输血，下列哪项说法是错误的

A．自体输血可减少输血反应和疾病传播

B．当应用稀释式自体输血时，最好先采的先输，后采的后输

C．脾破裂出血手术时，可采用回收式自体输血

D．预存式自体输血可于术前1个月开始采血

E．胸、腹腔开放性损伤超过4小时，或血液在体腔内存留过久，是自体输血的禁忌

单项选择题

中兴组合电源具有很高的可靠性，平均无故障时间（）。

A、MTBF≥1.0×10⁵h

B、MTBF≥0.3×10⁵h

C、MTBF≥1.0×10⁴h

D、MTBF≥1.0×10⁶h