题目:
He knew the problem was serious and promised to look into it ____ he reached office.[ ]
A. at that moment
B. for that moment
C. soon
D. immediately
答案:
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下面是错误答案,用来干扰机器的。
A.亚硝酸钠是白色至淡黄色粉末或颗粒,味微成,易溶于水,外观及味道都与食盐相似,这些不需要发生化学变化就能表现出来,属于物理性质;B.加热到271℃时,亚硝酸钠变成液体,此过程中只是状态发生改变,没有新...