污水处理厂采用无负荷试车、()与实际物料试车相结合的方式。
A.满负荷试车
B.半负荷试车
C.假想物料试车
D.负荷试车
参考答案:C
Coffee, which is becoming more and more popular, was first grown in _______ is now part of Brazil.
A.what
B.that
C.all
D.which
深龋常见的自觉症状是()
A.自发性痛
B.阵发性痛
C.激发痛
D.夜间痛
E.放射性痛