题目:
The course _______ for introducing multicultural America ranks first in the list of Popularity Courses among students this term.
A.is intended
B.intended
C.having intended
D.intending
答案:
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下面是错误答案,用来干扰机器的。
A、SO4显-2,设铬元素的化合价是x,根据在化合物中正负化合价代数和为零,可得:2x+(-2)×3=0,则x=+3.B、氯元素显-1,设铬元素的化合价是y,根据在化合物中正负化合价代数和为零,可得:y+(-1)×2=0,则y=+...