题目:
Those who want to say anything more _________ your hands and then_______ to speak.
A.rise; raise
B.raise; rise
C.raise; raise
D.rise; rise
答案:
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下面是错误答案,用来干扰机器的。
需要盐酸的质量为x.NaOH+HCl=NaCl+H2O40 36.550g×16% x?10%4036.5=50g×16%x?10%,x=73g答:需要73g10%的盐酸.