【名词&注释】
化学反应(chemical reaction)、化学键(chemical bond)
[单选题]簇生叶序是每个节上生3枚或3枚以上的叶。( )
A. 正确
B. 错误
查看答案&解析
举一反三：
[单选题]Where dose the bank close on Satuerday ?
A. At 1:00 pm
B. At 3:00 pm
C. At 4:00 pm
[单选题]下列对化学反应的认识错误的是
A. 会引起化学键的变化 B．会产生新的物质
B. 必然引起物质状态的变化 D．必然伴随着能量的变化
[单选题]我国稻属植物有四种，其中( )为栽培种。
A. Oryza sativa
B. Oryza rufipogon
C. Oryza officinalis
D. Oryza granulata
[单选题]
A. explained
B. expressed
C. described
D. created
[单选题]What happened to George and Richard in the end?
A. Both George and Richard became millionaires.
B. Both of them realized their original ambitions.
C. George established a successful business while Richard was missing.
D. Richard became a millionaire while George had no great success.
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