物质的量是SI基本单位,其单位符号为摩尔,单位名称为mol.
参考答案:错
从 A、B、C三个选项中,选出与画线部分意思相同或相近并能替代的那一项。
1. Whenever you like,I"ll discuss(讨论) it with you.[ ]
A. When
B. Wherever
C. No matter when
2. A lot of animals only wake up at nights.[ ]
A. ring up
B. get up
C. awake
3. Jim likes sports,such as basketball,soccer,and baseball. [ ]
A. for example
B. as
C. like
4. English is popular around the world.[ ]
A. on the earth
B. in the world
C. all over the world
5. China has the largest population in the world.[ ]
A. most
B. more
C. biggest
比例(成数)和比例(成数)方差的关系是()
A.比例越接近于0,比例方差越大
B.比例越接近于1,比例方差越大
C.比例越接近于0.5,比例方差越大
D.比例越接近于0.25,比例方差越大