转导子
参考答案:
从被转导噬菌体感染的受体菌中选择出来在遗传上已发生重组的受体菌称为转导子。
以出让方式取得土地使用权的,转让房地产时需符合的条件不包括( )。
A.房屋已经建成B.可以不持有房屋所有权证书C.按照合同约定已经支付全部土地使用权出让金,并取得土地使用权证书D.完成开发投资总额25%以上,属成片开发土地
Magnetic resonance imaging (MRI)—a noninvasive diagnostic procedure—can be used to identify blockages in the coronary arteries. In contrast to angiograms—the invasive procedure customarily used—MRI’s pose no risk to patients. Thus, to guarantee patient safety in the attempt to diagnose arterial blockages, MRI’s should replace angiograms in all attempts at diagnosing coronary blockages. Which of the following, if true, would most support the recommendation above
A.Angiograms can be used to diagnose conditions other than blockages in arteries.
B.MRI’s were designed primarily in order to diagnose blockages in the coronary arteries.
C.Angiograms reveal more information about the nature of a blockage than an MRI can.
D.An MRI is just as likely as an angiogram to identify an arterial blockage.
E.(E) Some patients for whom an angiogram presents no risk are unwilling to undergo an MRI.