风险削减措施应包括预防事故、控制事故、预防急慢性()、降低事故长期的和短期的影响等部分。
A、地方病;
B、传染病;
C、矽肺病;
D、职业病;
参考答案:D
喷煤布袋收粉器反吹压力规定在0.25—0.35MPa。
句型转化。
1. Tina got Jack Rean's autograph. (就画线部分提问)
_____ autograph_____Tina _____ ?
2. How was your day off?(改为同义句)
_____was your day off_____?
3. He begins to work at seven o'clock. (用yesterday改写)
He _____to work at seven o'clock_____.