A.0-初应力(0.3σcon)-σcon
B.0-初应力(0.2σcon)-σcon
C.0-初应力(0.6σcon)-σcon
D.0-初应力(0.6σcon)-1.2σcon
A.0→初应力→102%σcon(持荷2min)→95%σcon→σcon
B.0→初应力→102%σcon(持荷2min)→90%σcon→σcon
C.0→初应力→105%σcon(持荷2min)→90%σcon→σcon
D.0→初应力→105%σcon(持荷2min)→95%σcon→σcon
It is known that solar power can ______ electric energy.
A.convert into
B.convert to
C.be converted into
D.be converted to
It’s a good idea. We’ll discuss the details of ________.
A. its plan
B.our scheme
C.their conspiracy
D.our cooperation
In Henry's experiment,the galvanometer indicated a voltage when______.
A. the coil was connected to a battery
B. the coil was disconnected to a battery
C. neither A nor B
D. both A and B
A. sooner or later
B. pro or con
C. now and then
D. To take dancing lessons
E. Put him in prison
F. here and there
G. when will I get out of jail
H. Very much
A thief with a long record was brought before a judge.
Judge: Have you ever stolen things?
Thief. Oh, (56) .
According to the passage, what attracts man's greater attention?
A. Fly ash.
B. The construction of dams, bricks, and roads.
C. Extracting aluminum, silicon, and magnetic from ash.
D. The available technology.
We human beings usually express our thoughts ______ words.
A.through means of
B.by means of
C.through means of
D.by mean of
Our living standard is still very low, but we are ______ living in poverty.
A.by all means
B.by no means
C.by every means
D.by means of