为了在短时间内了解某市人群口腔健康状况，并估计在该人群中开展口腔保健工作所需的人力、物力。检

A.Optical fiber

B.Access point

C.Directional antenna

D.Omni-directional antenna

A．Is there a clear opening statement of the point of the paper

B．Are all the materials on target in support of the opening point

C．Is there specific evidence to support the opening point

D．Is there enough specific evidence

fresh one’s memory; measure; make a point of doing something; accompany; last but not least; point out; at hand; pay off; principle 17. She closed her eyes against the _______ light.

fresh one’s memory; measure; make a point of doing something; accompany; last but not least; point out; at hand; pay off; principle 7. She closed her eyes against the _______ light.

fresh one’s memory; measure; make a point of doing something; accompany; last but not least; point out; at hand; pay off; principle 6. Don’t think it is profitless to do this research. The effort will _______ in the long run.

fresh one’s memory; measure; make a point of doing something; accompany; last but not least; point out; at hand; pay off; principle 4. Being a teacher of two large classes, David always _______ spending as much as he can with them.

A、Clear purpose

B、Single focus

C、Logical organization

D、Clear point of view

E、Sufficient and relevant support

F、Target readers

G、Reader engagement

A、extraction of vector DNA, ligation of target DNA to vector DNA, restriction of target DNA

B、restriction of target DNA, ligation of cut (that is, restricted) target DNA to vector DNA which has already been cut, transformation of host cells

C、cutting target DNA, cutting vector DNA, amplifying target DNA

D、amplifying target DNA, ligating target DNA to cut vector DNA, homologous recombination of target and vector DNA

A.hit the target of

B.hit the target to

C.hit target to

D.hit target of