目前测定血清总胆固醇最常用的方法为()
A.比色法
B.气相色谱法
C.高效液相色谱法
D.核素稀释质谱法
E.酶法
参考答案:C
用合适的介词填空。
1. The teacher is talking _____ my mother.
2. We walked _____ Chang'an Park yesterday.
3. My mother went to Shanghai yesterday. Now she is arriving home ______ Shanghai.
4. I like dogs. So my father wants to buy dog ______ me.
5. I looked ______ many video shops. At last, I found the CD.
机动车落水后,要迅速关闭车窗阻挡车内进水,短暂闭绝空气,可打电话告知救援人员失事地点,等待救援。