What are the manners of the hand shake for camera?
A. You body shoud face the camera.
B. Turn to look at the person whose hand you are shaking.
C. Avoid looking them in the eyes.
D. Hold the hands steady when photo is beingtaken.
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What statements about the triple hand shake are incorrect?
A. It needs 3 people offer their right hands.
B. It is extremely rare nowadays.
C. The signing of the Camp of David Middle East peace agreement is a common occasion of the triple hand shake.
D. UK Primine Minister Blair and Clinton always use triple hand shake to show their solidarity with each other.
UK Prime Minister Blair andObama used to look each other smile and nod their heads for the camera to show their solidarity with each other.
A. 对
B. 错
DNA分子中的碱基组成是:
A.A+C=G+T
B.C=G
C.A=T
D.C+G=A+T
DNA二级结构特点有:
A.两条多核苷酸链反向平行围绕同一中心轴构成双螺旋
B.以A-T,G-C方式形成碱基配对
C.双链均为右手螺旋
D.链状骨架由脱氧核糖和磷酸组成