物质
X
Y
Z
Q
反应前质量/g
8
2
20
5
反应后质量/g
待测
10
13
⑴____ A. out B. shout C. house D. would
⑵____ A. tie B. big C. wish D. trick
⑶____ A. world B. important C. score D. more
⑷____ A. area B. bean C. cheap D. meat
⑸____ A. include B. number C. pumpkin D. fun