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【单选题】
如图 所示,在菱形 ABCD 中,不一定成立的是 ( )A.
四边形 ABCD 是平行四边形
B.
AC ⊥ BD
C.
△ ABD 是等边三角形
D.
∠ CAB ＝ ∠ CAD
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【单选题】Personally, I encourage people to do extreme sports because it is citizens’ elementary right to opt for their favorite sports. Attempts should be made to ensure these dangerous sports are thrilling an...
A.
a summary and final thought, a recommendation
B.
a summary and final thought, quotation
C.
a recommendation, a summary and final thought
D.
a summary and final thought, quotation
【单选题】Some extreme sports ______.
A.
cost a lot of money,
B.
belong in the category of popular sports.
C.
waste your time.
D.
are forbidden.
【简答题】系统设计的五个指标是可靠性、工作质量、________、工作效率和经济性。
【单选题】Some extreme sports_____.
A.
cost a lot of money
B.
belong to the category of popular sports
【简答题】Some extreme sports __________. (10.0分)A. cost
a lot of money B. belong to the category of popular sports
【简答题】Nowadays more and more young athletes are taking part in the risky activities called “extreme sports” or “X-sports”. In the past young athletes would play baseball. Today, they want risk and excitemen...
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