_____ primary culture, the cells were resuspended _____ Dulbecco’s modified Eagle’s medium containing 10% (vol/vol) fetal bovine serum and gentamicin.

S-containing compounds are a group of naturally occurring chemical compounds that mostly contain basic nitrogen atoms.

Bacteria that contain ”empty” plasmid, (plasmid without the eukaryotic gene) would grow? in all four types of broth.|only in the broth containing both antibiotics.|in the broth containing tetracycline, but not in the broth containing ampicillin.|in the nutrient broth plus ampicillin, but not in the broth containing tetracycline.

植物化学物可以分为（ ）。 A: Phenolic compounds B: S-containing compounds C: Terpenes D: Alkaloid

_____ primary culture, the cells were resuspended _____ Dulbecco’s modified Eagle’s medium containing 10% (vol/vol) fetal bovine serum and gentamicin. A: By...with B: For...in C: To...by D: At...over

The letterhead helps to form the impression of the writer’s firm, usually containing all or some of the following elements: the company’s name and address, postcode, telephone number, fax number, e-mail address, even web address, and etc.

Nicholas Winton’s rescue action went unnoticed for half a century until in 1988 _______ found a detailed scrapbook in their attic, containing lists of the children, their parents' names, the names and addresses of the families that adopted these children.

You should have three nutritious meals a day to stay healthy. A: valuable to the body as food B: containing rich proteins C: easily digested D: containing little salt

Hematochezia() A: the presence of red blood cells in the urine B: abnormally dark tarry feces containing blood C: serious bleeding inside a person's body D: the passage of fresh blood through the anus

The poetic meter is iambic pentameter, containing 10 syllables with ____ pattern.