【名词&注释】
系统分类(systematics)、初生壁(primary wall)
[单选题]花药绒毡层细胞来自( )。
A. 表皮细胞
B. 初生壁细胞
C. 造孢细胞(造孢组织)
D. 中层细胞
查看答案&解析
举一反三：
[单选题]该区域河流水文特征是
A. 夏季流量小 B． 补给以降水为主
B. 水量向下游增大
C. 径流年际变化小
[单选题]What relation is the woman to Mr.Cooper?
A. His wife.
B. His boss.
C. His secretary.
[单选题]What is the main purpose of the passage?
A. To show us the hidden beauty in our world.
B. to warn us not to get lost in the fantasy world.
C. To argue against the misuse of the sense of wonder.
D. To discuss the influence of the world of make-believe.
[单选题]Whenever I met her, _________ was fairly often, she greeted me with a sweet smile.
A. who
B. which
C. when
D. that
[单选题]罂粟目在系统分类上属于( )。
A. 柔荑花序类
B. 3基数花类
C. 辐射对称花类
D. 多心皮类
[单选题]柑橘(桔)属常见种的鉴别特征之一是( )。
A. 有无茎刺
B. 是否为单身复叶
C. 有无花盘
D. 叶轴翅有或无，宽或窄
[单选题]皮孔是表皮上的通气组织。( )
A. 正确
B. 错误
[单选题]角苔属植物为具背腹之分的叶状体。( )
A. 正确
B. 错误
[单选题]叶基二裂片向两侧外指，称( )。
A. 耳形
B. 箭形
C. 匙形
D. 戟形
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