— ______ your telephone number? —6873214

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问题选择题

— ______ your telephone number? —6873214. [ ]

A. How much is

B. How many are

C. What is

D. How many is

答案

答案：C

单项选择题

关于血清胰蛋白酶的叙述，错误的是（）。

A.急性胰腺炎时，免疫反应性胰蛋白酶与淀粉酶平行升高

B.慢性胰腺炎无脂肪泻时，血清胰蛋白酶-1无变化

C.胰腺癌时，血清胰蛋白酶变化不定

D.慢性肾衰竭时，血清免疫反应性胰蛋白酶-1可降低

E.糖尿病时，血清免疫反应性胰蛋白酶可降低

单项选择题

Geographic range is the maximum distance at which a light may be seen under（）.

A.existing visibility conditions，limited only by the curvature of the Earth

B.perfect visibility conditions，limited only by the curvature of the Earth

C.existing visibility conditions，limited only by the intensity of the light

D.perfect visibility conditions，limited only by interference from background lighting