上下交叉作业时应采取()措施。
A、防护隔离
B、防护
C、隔离
D、砂石
参考答案:A
Read and fill in the blanks. 用所给单词的适当形式填空。
1. Yesterday I (walk) to the park.
2. Bob's team is ( play) basketball now.
3. Tomorrow she (go) to buy a new dress.
4. —What did you do? —I (teach) Kim to play the piano.
5. —Who won? —The orange team (win).
高果糖浆生产需要的酶是[ ]
A.葡萄糖异构酶
B.蔗糖酶
C.麦芽糖酶
D.果糖酶