对于高边坡滑坡、洞室坍塌、泥石流等重大危险,水利水电施工企业如采取了及时支护等预防措施,则不需安排专人巡视。
参考答案:错
---Mum, may I have some cakes?
---Sorry, there’s ________left . I’ll go and buy some for you tonight.
A.nothing
B.no one
C.no
D.none
食品加工过程不卫生时不能食用。