牙周病检查时,牙周探诊用力应是
A.10~20g
B.20~25g
C.25g以上
D.15~20g
E.20g以下
参考答案:B
根据所给提示及句意完成单词的拼写。
1.—How many m ________ are there in an hour?
—There are 60.
2. Do these clips m ________ her favorite T-shirt?
3. Hello! Daniel. Are you s ________ at the moment?
4. How much is this ________ (双) of sports shoes?
5. The jeans don’t ________(合身) me well.
不定积分xf″(x)dx等于()
A.xf′(x)-f′(x)+c
B.xf′(x)-f(x)+c
C.xf′(x)+f′(x)+c
D.xf′(x)+f(x)+c