B．ased on the laser operation treatment of three patients。what can we infer from the passage?

A．Laser light treatment is safe and effective．

B．Laser light treatment is dangerous and ineffective

C．Laser light treatment still requires much more studies．

D．Government should encourage doctors to do research of laser light treatment on the human body．

[单选题]The successful operation of any engine or machine and （） depend on effective lubrication.A . their no trouble periodB . their freely trouble periodC . its free trouble lifeD . its trouble-free life

[单选题]Which of the following assumptions is least likely required for the differe

[名词解释] 英译中：Laser scanner

[名词解释] laser scanning confocal microscope;LSCM （激光扫描共聚焦显微镜）

[单选题]（）is for the operation ordering and the information exchange by internet among the firms. A . order processingB . order makingC . Electronic order systemD . order form

[主观题]Similarly, the preferential treatment given to occupational disability by the social security service has been increasingly questioned with the demands for the upgrading of benefits for the other types of disability.

[单选题]Fight against theSide Effects of Cancer TreatmentOnce the harddecisions hav

[单选题]Fight against theSide Effects of Cancer TreatmentOnce the harddecisions hav

[单选题]Fight against theSide Effects of Cancer TreatmentOnce the harddecisions hav

[单选题]Fight against theSide Effects of Cancer TreatmentOnce the harddecisions hav