1个铅球重4千克.______.(判断对错)
由分析可知:1个铅球重4千克符合实际情况;
故答案为:√.
The boys are reading ______. [ ]
A. in the sun
B. under the sun
C. below the sun
D. in sun
百叶箱要保持洁白,木质百叶箱视具体情况每()重新油漆1次。