质量标准规定一般巷道刚性支架或可缩性U型钢支架的支架间距允许偏差值为()。
A、±80mm
B、±50mm
C、±100mm
参考答案:C
用所给词的适当形式填空,每空不限一词。
1. I think Sandy and Lucy_____ ( be ) in the same class.
2. _____ Amy _____ (take) her dog for a walk every afternoon?
3. My uncle with his son _____ (fly) kites on Saturday afternoon.
4. Millie _____ (not like) comic books, but she loves _____ (read) funny stories.
5. My aunt is good at _____ (swim). She is a good _____ (swim).
6. Millie's grandfather is ill at home, her grandmother looks after _____ (he).
7. Daniel sometimes _____ (spend) an hour _____ (do) his homework.
8. These bags are those_____ (play). They like to play football with _____ (we).
9. I'd like _____ (talk) with you after supper.
10. The Chinese restaurant is on the _____ (one) floor. Let's go and have a look.
11. Eric, _____ (not play) football in the street.
收割条件可以适用于波士顿咨询公司法中的—类业务单位()。
A、弱小牛类
B、问号类
C、熊类
D、狗类