t=0:1:5产生行向量t，各元素为0、1、2、3、4、5

已知T（1）=9，T（2）=8，T（0）=5，Total=T（1）+T（2）+T（0），则Total=（）。 A: 9 B: 22 C: 8 D: 5

The farmer is working now. He's fed the horse and the sheep,   [u]            [/u]   ? 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: doesn't he B: isn't he C: wasn't he D: hasn't he

He's read this book before，  [u]         [/u]  ?  未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: hasn't he   B: doesn't he C: isn't he

已知T（1）=9，T（2）=8，T（0）=5，Total=T（1）+T（2）+T（0），则Total=（）。

以下代码 var t = 0 || 5，t的值是 A: true B: false C: 5 D: 0

My boss had an important meeting this morning, [u] [/u]? 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: hadn’t he B: hasn’t he C: doesn’t he D: didn’t he

In this part, you will hear 5 short conversations. A: He doesn’t think it’s necessary to eat vegetables. B: He prefers steamed vegetables. C: He doesn’t like vegetables. D: He doesn’t enjoy over-cooked vegetables.

下列Matlab代码，能求解微分方程 y'(t) = 2*t , y(0) = 1的是( ) A: tspan = [0 5];<br> y0 = 0;<br> [t,y] = ode45(@(t,y) 2*t, tspan, y0); B: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*t, tspan, y0); C: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*y, tspan, y0); D: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*t*y, tspan, y0);

He must be ill, ______?: doesn’t he|isn’t he|mustn’t he|needn’t he