A:煤炭型污染
B:石油型
C:粉尘型
D:SO2污染型
– Shall we go and have a picnic at the weekend?– _____ the weather report says there might be a cold front by then.
A. have a headache
B. fall down
C. have a stomach ache
D. bump his head
E. have a fever
⑴ ____
⑵ ____
⑶ ____
⑷ ____
⑸ ____
为响应 “绿色校园”的号召,八年级(5)班全体师生义务植树300棵。原计划每小时植树x棵,但由于参加植树的全体师生植树的积极性高涨,实际工作效率提高为原计划的1.2倍,结果提前20分钟完成任务。则下面所列方程中,正确的是( )