尿淀粉酶正常值（）（Somogyi法U/dl） A.80～300 B.300～500

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问题单项选择题

尿淀粉酶正常值（）（Somogyi法U/dl）

A.80～300

B.300～500

C.40～180

D.>500

E.<40

答案

参考答案：A

选择题

The big fire in Shanghai, believed to ________ due to the burning of construction materials, caused

58 deaths and destroyed all the belongings of the people there.[ ]

A. have occurred

B. occur

C. have been occurring

D. be occurring

单项选择题

上颌乳尖牙的近中和下颌乳尖牙远中出现间隙称为

A．生长间隙

B．灵长间隙

C．替牙间隙

D．可用间隙

E．必须间隙