当x→0时,是()。
A.无穷小量
B.无穷大量
C.有界但非无穷小量
D.无界但非无穷大量
参考答案:D
解析:
令
由此可排除A、C,同理,令,则可排除B,故正确答案为D。
用 hold 的相关短语完成句子。
1. She just managed to her anger.
2. The rate of inflation must be .
3. Can you ? 1'11 see if he is here.
4. He ______ the back of the chair to stop himself' from falling.
5. I don't the use of force.
6. An accident is traffic.
7. My application was by postal strike.
慢性肾炎引起高血压肾功能不全与高血压病引起肾功能不全的最重要的鉴别资料是()
A.血压增高程度
B.肾功能损害程度
C.眼底改变
D.高血压与肾炎的发病史
E.心功能改变