【名词&注释】
被子植物(angiosperm)、无机盐(inorganic salt)、厚角组织(collenchyma)、厚壁组织(sclerenchyma)
[填空题]机械组织有两类:()和()。
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学习资料:
[单选题]在被子植物体内起输导水分和无机盐的是()
A. 管胞
B. 筛胞
C. 导管
D. 筛管
E. 导管和管胞
[单选题]When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as ()
A. the amount of lube oil additives increase
B. piston speeds increase
C. injection pressure decrease
D. engine speeds decrease
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