[图][图]（8 points for each)...

三、TURE OR FALSE: (10 points, 2 points for each) 1. The principal properties that can be exploited to separate proteins form each other are size, charge, hydrophobicity and affinity for other molecules. （ ） 2. RNA transcription is asymmetric. It means the coding strand is always the same strand. （ ） 3. There is a loop of 12 amino acids anchored by two cysteine and two histidine residues that tetrahedrally co-ordinate a zinc ion in C2H2 zinc finger. （ ） 4. Ribozymes are catalytic RNA molecules that can catalyze particular biochemical reactions in the absence of protein. （ ） 5. Both shearing and sonication denature the DNA. They also reduce the length of DNA. （ ）

Find all critical points for the function,and classify each as a relative maximum,relative minimum, or saddle point.

A、deducted

B、discounted

C、increased

D、added

【C13】

A．point

B．question

C．reach

D．touch

A technician needs to install additional access points for a new high speed connection being added in the new office space. Which of the following will MOST likely be installed to allow additional CAT5 cable connections?（）

A. Smart Jack

B. Demarc

C. 110 Block

D. 66 Block

A、quits keep

B、quit keeping

C、quits keeping

D、quit keep