关于2D-TOF与3D-TOF MRA的比较描述，错误的是
A. 2D-TOF流入饱和效应小，对慢流、血流方向一致的血管显示好;流动-静止对比好
B. 3D-TOF流人饱和效应明显，成像块厚受血管流速制约;信噪比好
C. 2D-TOF层面厚，空间分辨力差;相位弥散强，弯曲血管信号有丢失
D. 3D-TOF层厚较薄，空间分辨力髙;对复杂弯曲血管的信号丢失少
E. 相同容积2D-TOF较3D-TOF成像时间长
Suppose your friend Jack is addicted to online chatting. Write him an email to 1)tell
The right way to safeguard common sense in business is to______.
A. develop oneself in a company
B. work hard to be a great businessman
C. start one" s own business
D. have enough inventive ideas
【B2】
A. identified
B. recognized
C. called
D. spotted
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