Which of the following should be done FIRST before installing NOS patches in a productionenvironment？（） A: Install patches on non critical servers B: Install patches in test environment C: Install patches on a PC D: Install patches on critical servers

Patches of green had begun to appear. There was green grass ________.

Lesson 16 听力选择-3[音频] A: contaminated by ice patches B: covered with water patches C: flooded by standing water D: covered with a lot of debris

The secondary lymphoid organs include the _____, lymph nodes, tonsils, appendix and Peyer patches in the small intestine.

People with acute leukemia may not have______. A: shivering B: night sweats C: purplish patches D: nosebleed

Patches of green had begun to appear. There was green grass ________. A: every where B: only in one or two places C: in one place D: here and there

Susan has ______ the elbows of her son’s jacket with leather patches to make it more durable. A: reinforced B: sustained C: C．steadied D: D．confirmed

Susan has _____ the elbows of her son’s jacket with leather patches to make it more durable. A: einforced B: sustained C: steadied D: confirmed

Susan has ______ the elbows of her son's jacket with leather patches to make it more durable. A: reinforced B: sustained C: spread D: confirmed

Susan has _____ the elbows of her son's jacket with leather patches to make it more durable.( ) A: confirmed B: steadied C: sustained D: reinforced