包埋蜡型时,先用水清洗,再用酒精涂布表面的主要目的是
A.硬化表面
B.去除表面杂质
C.降低表面张力
D.防止蜡型破损
E.减小蜡型膨胀
参考答案:C
The news that China is _________ its family planning policy has caused a heated discussion in China, and the new policy will _________ about 15 to 20 million people, only half of whom are actually willing to have a second child.
A.relaxing; apply to
B.loosening; adjust to
C.arguing; refer to
D.delivering; adapt to
总分类账可以用总分类账户本期()对照表替代。
A.借方与贷方发生额
B.借方与贷方余额
C.发生额、余额
D.期初与期末余额