种间竞争：__________ competition A: interspecific B: parasitic C: pesticide D: zone

Malaria is an infectious parasitic disease that can be either acute or chronic and is frequently A: repeating B: terminal C: debilitating D: recurrent

Malaria is all infectious parasitic disease that can be either acute or chronic and is frequent______. A: repeating B: terminal C: debilitating D: recurrent

In low frequency range, drop in gain is caused by ( ) A: bypass capacitors B: coupling capacitors C: transistor's parasitic capacitors D: bias resistors

‏In low frequency range, drop in gain is caused by ( )​ A: bypass capacitors B: coupling capacitors C: transistor's parasitic capacitors D: bias resistors

​In high frequency range, drop in gain is caused by ( )‏ A: bypass capacitors B: coupling capacitors C: transistor's parasitic capacitors D: bias resistors

In high frequency range, drop in gain is caused by ( ) A: bypass capacitors B: coupling capacitors C: transistor's parasitic capacitors D: bias resistors

5．The switching losses are comprised of the on-state losses, and the losses in the transition states.: A: the parasitic losses B: the dielectric losses C: the hysteresis losses D: the off-state losses

White blood cells patrol the body searching for potential sources of infection and destroy invading pathogens, such as ________, ________, ________, and ________. A: viruses B: bacteria C: fungi D: parasitic microorganisms

() are free-living organisms that are capable of becoming parasitic<br/>if placed in a situation conductive to such a mode. A: opportunistic parasite B: Obligatove parasites C: Endoparasite D: Facultative parasites