【名词&注释】
铁蛋白(ferritin)、花色素(anthocyanidin)、豆血红蛋白(leghemoglobin)
[单选题]根瘤呈红色，因为根瘤细胞含有( )。
A. 铁蛋白
B. 钼-铁蛋白
C. 豆血红蛋白
D. 花色素
查看答案&解析
举一反三：
[单选题]Why did Jennifer try to stop her boyfriend?
A. Because they would miss their train.
B. Because he didn’t see the train coming.
C. Because she was sure Lisa was hard to lift.
D. Because she was afraid the train would kill him.
[单选题]Don’t worry if you don’t understand everything.The teacher will ______ the main points at the end.
A. recover
B. review
C. require
D. remember
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