化学降解法中，由于化学切割反应并非完全绝对的单一碱基特异性，因此除G,C残基外，A,T残基的位置需结合其他泳道的条带加以推断。

T残基的位置推断需结合的泳道是

A:T组 B:G+A组 C:G组和G+A组 D:C+T组 E:C组和C+T组

所谓加权即重点突出某方面的特性。之所以要加权是因为在一般的成像过程中，组织的各方面特性（如：质子密度、T值、T值）均对MR信号有贡献，几乎不可能得到仅纯粹反映组织一种特性的MR图像，通过利用成像参数的调整，使图像主要反映组织某方面特性，而尽量抑制组织其他特性对MR信号的影响，这就是"加权"。T加权成像是指这种成像方法重点突出组织纵向弛豫差别，而尽量减少组织其他特性如横向弛豫等对图像的影响；T加权成像重点突出组织的横向弛豫差别；质子密度加权像则主要反映组织的质子含量差别。

关于TWI的叙述正确的是

A:长T的组织呈低信号 B:脂肪呈高信号 C:短T的组织呈低信号 D:脑脊液呈低信号 E:骨骼呈高信号

患者女，57岁。胆总管结石。入院行胆总管切开探查，T型管引流术。

术后针对T型管引流的护理措施，不妥的是

A:记录引流胆汁的量、色及性状 B:每日用生理盐水冲洗T型管 C:一般留置2周 D:拔管前经T管胆道造影 E:拔管前夹管观察1~2天

（）doesn’t need to change package of goods or to stop in any place between the origin and destination

A:Through transport B:Transfer transport C:Combined transport D:D Motor transport

（）doesn’t need to change package of goods or to stop in any place between the origin and the destination point.

A:Through transport B:Transfer transport C:Combined transport D:Motor transport

（）doesn’t need to change package of goods or to stop in any place between the origin and destination point.

A:Through transport B:Transfer transport C:combined transport D:Motor transport

ε（3-t）ε（t）=（）

A:ε（t）-ε（t-3） B:ε（t） C:ε（t）-ε（3-t） D:ε（3-t）

I don't know the origin of this custom.

A:nature B:reason C:beginning D:result

A large number of documents are used in the modern international trade such as marine bill of lading, letter of credit, insurance policy, commercial invoice, packing list, air waybill, certificate of origin，packing list, multimodal transport document, parcel post receipt, rail waybill etc. The (1) evidences the contract of carriage of goods by at least two modes of transport．The (2) evidences the contract of carriage of goods by air. Unlike B/L, (3) evidences the contract of carriage but is not a document of title and is not negotiable. The document issued by the carrier or his a gent to enable the consignee or his forwarding agent to take delivery of the imported cargo from the vessel or port is called (4) . (5) is a document issued by the authorized body in the exporter’s country stating the country of origin of the goods.

A:Packing list B:Certificate of origin C:Invoice D:Dock receipt