题目内容

以下哪个是Student类创建对象的正确语句（）

A. s1=new Student（）
B. s1=Student（）
C. Student s1=new Student（）
D. Student s1=Student（）

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For a mature plant cell which contains a central vacuole, the water potential equals（）

A. The sum of Ψp, Ψs, and Ψm
B. The sum of Ψp and Ψm
C. The sum of Ψp and Ψs
D. Ψs minus Ψm

The dried seeds absorb water mainly through , which greatly depends on the value of（）

A. Osmosis, Ψs
B. Active absorption, Ψp
C. Passive absorption, Ψs
D. Imbibition, Ψm

杯状细胞可见于（）

A. 单层扁平上皮
B. 单层柱状上皮
C．未角化的复层扁平上皮
D. 变移上皮

Many parents are caught__ because they have to protect their kids, and at the same time, promote the kids’ independence（）

A. in a double bind
B. in a double situation
C. under a trap
D. under a confinement