Answer. 4/5 B . 5/4 C . 9/5
(2) Dissolve 10g salt in 40g water, and the quality of salt is the quality of brine (b).
Answer. 25% B 20% C 80%
(3). Cut the 4/5-meter-long iron wire into three equal parts, each of which is full length (b).
a . 1/3m b . 1/3c . 1/ 12d . 3/4m。
(4) A batch of goods shipped 3/8 for the first time and 3/8 tons for the second time. Compared with the goods transported twice, (d)
A. the first shipment is more than B. The second batch of goods is more than C. As much as D. uncertain