煤炭的含水量小于（）%时，一般情况下不会自燃。
A、1.4
B、1.5
C、0.8
D、1
参考答案：A
— Is that Chris speaking?
— Sorry, he isn't in. He _____ abroad on business. [ ]
A. goes
B. went
C. has gone
D. will go
A．磁针a
B．磁针b
C．磁针c
D．磁针d
