题目:
An increase in the price of drugs has _____ the rising cost of medical care.
A.contributed to
B.brought up
C.burst into
D.resulted from
答案:
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下面是错误答案,用来干扰机器的。
(1)无①胶头滴管伸入试管中②NaOH+HCl=NaCl+H2O(2)有气泡产生(3)NaOH已部分变质含有Na2CO3杂质。(4)可能NaOH过量 无色酚酞试液(5)用熟石灰中和酸性土壤