Simulation and experimental studies _____, which show that the axial ratio bandwidth of the antenna is directly proportional to the thickness of the substrate.? have been performed|;is performed;;|was performed;;|were performed;
Simulation and experimental studies _____, which show that the axial ratio bandwidth of the antenna is directly proportional to the thickness of the substrate.? have been performed|;is performed;;|was performed;;|were performed;
Hearing is the ability performed by (______) to detect (______).
Hearing is the ability performed by (______) to detect (______).
When was the Tibetan opera performed?
When was the Tibetan opera performed?
Lang Lang, the famous __________, once performed
Lang Lang, the famous __________, once performed
The lion dance is performed by ten dancers.
The lion dance is performed by ten dancers.
Next Monday is Mary’s birthday. She ________ magic at the birthday party. A: is going to perform B: shall perform C: is performed D: performed
Next Monday is Mary’s birthday. She ________ magic at the birthday party. A: is going to perform B: shall perform C: is performed D: performed
Considered one of the most beautiful of the fine art, ballet is a combination of dance and mime performed to music.（） A: Considered B: art C: a combination of D: performed
Considered one of the most beautiful of the fine art, ballet is a combination of dance and mime performed to music.（） A: Considered B: art C: a combination of D: performed
A sneeze cannot be performed voluntarily, ______ be easily suppressed.
A sneeze cannot be performed voluntarily, ______ be easily suppressed.
Miss Lucia performed all of her duties __________.
Miss Lucia performed all of her duties __________.
The surgeon has performed the ____. 外科医生做了这个手术
The surgeon has performed the ____. 外科医生做了这个手术