【单选题】What is the purpose of a canal lock?
A.
To keep out boats that are too large for the canal.
B.
To measure the tonnage of canal boats.
C.
To load and unload the cargo.
D.
To change the depth of the water.
【单选题】The optic disc
A.
located in the bland part of the retina
B.
is formed by the optic nerve pierces the retina
C.
is sensitive to the light
D.
fovea centralis is its center
【单选题】筛检疾病时,所用试验方法的选择需要考虑的因素为:
【单选题】( )由建设单位或委托设计单位参照以往类似工程的造价资料编制,依据相应建设项目投资估算招标。
【单选题】S1: How many important Canals are there all over the world? S2: Two biggest canals: Panama Canal, and Suez Canal. Q: Which Canal is there in America? 0102dh107
C.
Panama and Suez Canal.
【单选题】施工质量检验,可以分为自检、互检、专检和交接检验,这是按照( )进行的分类。