在离开地球近20年后，美国“（）”土星探测器将于4月26日正式进入任务“大结局”，首

人员招聘的工作流程中，( )是起点。

A．人力需求诊断

B．制订招聘计划

C．发布招聘信息

D．回收招聘资料

盆式橡胶支座，同一梁端两支座高差允许偏差为（）mm。

Electronic mail and filing permit a user to compose and transmit a message on an office (71) system. In the early 1970s, the ARPANET community developed a number of such systems which have been heavily used. Through standard message format (72) , several hundred different computers and electronic mail interfaces are specification of how (73) and return addresses should appear on envelopes and which sizes are allowable for envelopes. In the electronic message world, they describe what (74) of characters are required at the (75) of a message to identify the sending and receiving mailboxes.

A．protocols

B．standards

C．roles

D．principles

（）用于制作雪泥。

A、电冰箱

B、碎冰机

C、刨冰机

D、制冰机

4岁以前，乳牙牙合的特征是（）。

A.牙齿排列紧密

B.无间隙

C.牙冠较直

D.牙合曲线不明显

E.上下颌第二乳磨牙远中面彼此相齐，成一垂直平面