()石油颜色的浓度,往往取决于石油中胶质、沥青质的含量。
参考答案:对
句型转换(每小题2分。共10分)
小题1:Both he and I are from Beijing.,(改为否定句)
he I am from Beijing
小题2:The box is too big for me to carry.(同义句转换)
The box is big I can’t carry it.
小题3:I like this CD because I can take it to the party.(对划线部分提问)
do you CD?
小题4:My mother allows me to choose my own clothes.( 同义句转换)
I to choose my own clothes
小题5:I spent one hundred Yuan in buying the present.(同义句转换)
The present one hundred Yuan
进入井、箱、()内等有限空间作业,应在作业入口处设专责监护人,监护人员应事先与作业人员规定明确的联络信号,并与作业人员保持联系,作业前和离开时应准确清点人数。
A.电缆夹层
B.隧道
C.柜
D.深坑