Itisusefultoscience()theearthasanobjectinspace.
A. toconsider
B. whichconsiders
C. considers
D. theconsiderationof
()withthesizeofthewholeearth,thehighestmountainsdonotseemhighatall.
A. Ifyoucompare
B. Comparethem
C. Whencompared
D. Acomparison
毛泽东在()上提出中国有两种命运。
A. 七大
B. 八大
C. 十一届三中全会
D. 七届二中全会
罐车罐体凹凸量大于()时调修。
A. 30mm
B. 50mm
C. 70mm
D. 80mm