问题
单项选择题
下列何种物质红细胞中含量比血浆中低（）
A.Cr
B.LDH
C.AST
D.Hb
E.Ca
答案
参考答案：E
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下列何种物质红细胞中含量比血浆中低（）
A.Cr
B.LDH
C.AST
D.Hb
E.Ca
参考答案：E
| 根据句子意思，从方框中选用恰当的词或短语适当形式填空。 | |
2. — Are you _________ take them home? — Yes, of course. 3. The baby is too small, you shouldn't _________ him at home _________ for too long. 4. The boy presses the doorbell and we can hear the sound _________ the house. 5. Lily is very polite, she often _________ the elderly. |