- Frau Chen, wie schreibt ____„Stück“? Mit„k“oder„ck“ ?-„Stück“schreibt ___ mit„ck“ .

通过CK指数（CK-MB/总CK）可以间接判断CK来源，如CK-MB超出上限，而CK-MB/总CK＜4%，可能原因为（）

He had gone to the reception desk, presumably to ______. A: check on B: check into C: check off D: check out

How to check the quality during production（） A: Check every one. B: Take samples to check it. C: Check it at random.

To show your ticket and get your seat at the airport is to _________. A: check out B: check off C: check in D: check on

Could you please _______over there in the front office? A. check in B. check off C. check on D. check about

不稳定型心绞痛患者 A: 、CK>100u/LCK-MB%>24% B: CK>100u/LCK-MB%为4%~25% C: CK>100u/LCK-MB%>25% D: CK轻度增高 E: CK-MB不增高

络合滴定分析中测定单一金属离子的条件是： （） A: lg（cKˊMY）≥8 B: cKˊMY≥10-8 C: lg（cKˊMY）≥6 D: cKˊMY≥10-6

What do you have to do before leave hotel（） A: check out B: check in C: check ove D: check on

You must_________at the airport an hour before your plane leaves. A: check in B: check out C: check with D: check over